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Патент USA US3048523

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Aug. 7, 1962
Filed Aug. 25, 1954
72/00/14.)‘ ,4.
5Y4) ‘
United States Patent 0 'ice
Fatented Aug. 7, 1962
are formed by cutting the felt in planes substantially at
right angles to the faces. While the strips may be made
of various widths, it has been found satisfactory with felts
of ordinary thickness to provide a width of about twice
the thickness of the strips. Where batt 2 is composed of
21/2 to 6 pounds per cubic foot mineral wool and is in
Thomas A. Hughes, Whitehouse, N.J., assignor to Johns
Manville Corporation, New York, N.Y., a corporation
of New York
Filed Aug. 25, 1954, Ser. No. 452,065
3 Claims. (Cl. 156—31)
tended for use as a thermal insulation, strips three inches
thick and six inches wide will be suitable.
The present invention relates to an improved ?brous
Ribs 6, joining the lateral (cut) edges of strips 4 should
batt and more particularly to a mineral wool thermal in 10 be thin but relatively rigid, i.e., the ribs should be su?i
sulating batt peculiarly adapted for use where insulation
ciently strong and in?exible to sustain the batt when the
may become wet, either from condensation or flooding, as,
same is soaked with water and subsequently dried. The
for example, in the ?oor structure of a refrigerated rail—
ribs are sheet-like in general contour but may, depend
way car. It will be understood that the term “mineral
ing upon the care with which the adhesive is applied, have
Wool” is used herein in a generic sense and includes ?< 15 somewhat irregular or discontinuous surfaces and yet be
brous material manufactured from rock, slag, glass, or the
satisfactory. Where the adhesive employed is a mixture
of asphalt and rosin, the materials are mixed and applied
A primary object of the present invention is to provide
in a molten state and permitted to harden by ordinary
a ?brous batt which retains its resilience and thickness
after wetting.
A particularly important feature of the present inven
A further object of the present invention is to provide
a ?brous thermal insulating batt having good resistance
to compacting from wetting and also having an insulating
ef?ciency comparable to other batts made from the same
?brous material but without substantial resistance to com
tion lies in cutting a felt of ?brous material in planes sub
stantially at right angles to the faces thereof and joining
the strips thus formed by adhesive connecting the cut
edges. The arrangement is such that the sheet-like ribs
25 of adhesive lie at right angles to the ‘faces to which a ma
jority of ?bers are generally parallel and hence the ribs
reinforce the batt against compressive forces from direc
tions in which the ?brous material has least resistance.
The arrangement also provides for maximum insulating
ef?ciency in the reinforced batt, as will be clear in FIG.
The invention will be more fully understood and fur
ther objects and advantages thereof will become more ap
parent when reference is made to the following detailed
description and to the accompanying drawing in which:
FIG. 1 is an isometric view illustrating a portion of the
product of the present invention and one method of as
sembling the same in an inverted position, and
FIG. 2 is a sectional view, with parts broken away, of
a structure including the product of the invention.
ported under the plate 24 and between plate supports 26
by sub-?ooring 28. Obviously, the direction of heat ?ow
in FIG. 2 is upwardly, and thus the general ?ber orienta
Referring to the drawing, and particularly to FIG. 1,
tion is across the path of heat flow to provide maximum
2 wherein a batt 2 is shown as installed under the ?oor
plate 24 of a refrigerated chamber. The batt 2 is sup
there is shown a partially formed ?brous batt 2 composed
of a plurality of strips 4 of ?brous material, such as min
eral wool, joined together at their lateral edges by ribs
6 of a relatively rigid adhesive material such as a mixture
of three parts of asphalt with one part of wood rosin.
The batt may be provided with a generally waterproof
but vapor permeable covering v8, such as a perforated 15
sistance to such forces.
lb. asbestos ‘felt saturated with asphalt, the ‘covering being
adhered to the batt at least at the side edges thereof and ;
extending over one face (the bottom face in FIG. 1) of
the batt. In one method of assembling the batt 2 the
covering 8 is placed on a ?at surface and edge portion
10 thereof, corresponding in width to the thickness of the
strips of ?brous material, is bent upwardly and adhered
to the lateral edge ‘14 of strip 12. The opposite lateral
edge 16 of this strip 12 is then coated with the desired
adhesive ‘material by brush or other means 22, the adhe
In a like manner successive strips 4 are joined to
gether until a batt of the desired width is formed, after
which the adhesive used is hardened or set by the re~
It will be understood that a sat
isfactory, though not the best, result may be obtained
when the ribs are at angles differing slightly from right
angles to the faces of the batt (faces 30 and 32 in ‘FIG.
2), and that ‘for purposes of the present invention it>is
only necessary to ‘arrange the ribs substantially at right
angles to the faces.
Having thus described my invention in rather full de
tail, it will be understood that these details need not be
strictly adhered to and that various changes and modifi
cations may suggest themselves to one skilled in the art.
all falling within the scope of the invention as de?ned
by the subjoined claims.
sive serving to join lateral edge 20 of strip 18 to the edge
Also, the undesirable compressive forces
which may result from wetting and drying batt 2 act in
vertical planes in FIG. 2 and ribs 6, being positioned to
lie in substantially vertical planes, provide maximum re
What I claim is:
1. A thermal insulating batt comprising a ?brous insu
lating material a majority of the ?bers of which lie gen
erally parallel to the face of the batt, said ?brous insu
quired process. If desired, of course, the covering 8 may
lating material when not reinforced being compactible
be adhered to the strips 4 throughout its area rather than
in directions perpendicular to said face by flooding with
at the side edges only of the batt. Where the use to 60 water, said thermal insulating batt comprising a plurality
which batt 2 is to be put does not require a covering, this
of strips of said ?brous insulating material, each of said
item may be eliminated, but where such a covering is re
strips having lateral edges, and relatively rigid sheet-like
quired, it is apparent that it can be used to advantage in
ribs of adhesive joining the lateral edges of adjacent
hand-assembly of the product.
strips and lying substantially at right angles to said face
One material from which strips 4 can be made is min 65 to reinforce said ?brous material against compacting.
eral wool felted in the manner disclosed in United States
2. An insulated structure comprising a thermal insu
Patent to Coleman No. 2,561,843, issued July 24, 1951,
lating batt positioned with a face thereof across a path of
but any water stable mineral ?ber material formed by col
heat flow, said thermal insulating batt comprising a plu
lecting ?ber on a conveyor from an air suspension will
rality of strips of ?brous insulating material a majority
usually be suitable. With such material the majority of 70 of the ?bers of which lie generally parallel to said face,
?bers in the felt lie generally parallel to the plane of the
each of said strips having lateral edges, said ?brous insu
conveyor and, hence, to the faces of the felt, and strips 4
lating material when not reinforced being compactible in
directions perpendicular to said face ‘by ?ooding with
like ribs of adhesive to reinforce said ?brous material
against compacting.
water,.and relatively rigid sheet-like ribs of adhesive join
ing the lateral edges of ‘adjacent strips and lying substan
tially at right angles to said face to reinforce said material
against compacting.
3. A method of forming a thermal insulating batt corn<
prising forming a felt of ?brous material with the major
ity of the ?bers of the felt lying generally parallel to a
'facethereof, said ?brous insulating material when not
reinforced being normally compactible in directions-per
pendicular to the face thereof by ?ooding with Water,
cutting said felt in planes substantially at right angles
*tosaid face to ‘form elongated strips having lateral edges,
‘coating at least one lateral edge of each of said strips
References Cited in» the ?le of this patent
Powell ______________ __ Sept. 26, 1933
Rosenblatt _______ __,_____ Jan. 9, 1934
'Schenk _____________ .. Dec. 13, 1938
Saborsky ____________ __ MaySO, 1939
Heritage et a1. ________ __ Oct.
Pearce ______________ __ Apr.
Heritage ____________ -_ Feb.
Modigliani __________ __ Mar.
ing-said cut lateral edges joined by relatively rigid sheet
with an adhesive material, and joining the cut lateral 15
‘edges of said strips to form a thermal insulating batt hav
Great Britain __________ __ June 2, 1936
Great Britain _________ __ Dec. 20, 1950
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